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Build format string at compile time

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This commit is contained in:
dmiller 2026-07-23 21:55:43 +00:00
parent f8b3de041d
commit 30f3839df2
1 changed files with 3 additions and 3 deletions
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6
libnetutil/massdns.cc
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@ -1502,7 +1502,9 @@ void DNS::ResolverImpl::platform_get_servers() {
// add_dns_server() function.
FILE *fp;
char buf[2048], *tp;
char fmt[32];
#define _STR(X) #X
#define FMT_STR_LEN(X) "%" _STR(X) "s"
static const char fmt[] = "nameserver " FMT_STR_LEN(INET6_ADDRSTRLEN);
char ipaddr[INET6_ADDRSTRLEN+1];
static bool firstrun = true;
@ -1513,8 +1515,6 @@ void DNS::ResolverImpl::platform_get_servers() {
return;
}
Snprintf(fmt, sizeof(fmt), "nameserver %%%us", INET6_ADDRSTRLEN);
while (fgets(buf, sizeof(buf), fp)) {
tp = buf;